垃圾渗滤液对香菜的生理毒害作用

【目的】研究不同体积分数垃圾渗滤液对香菜生长的影响，旨在为探明垃圾渗滤液对植物的毒害机理，从而为渗滤液的达标排放提供科学依据。【方法】以新西兰大叶香菜为研究对象，采用盆栽试验和培养皿法，研究不同体积分数（0%（对照），50%，67%，75%）垃圾渗滤液对香菜叶片叶绿素含量、外渗电导率、蛋白质含量及种子发芽率和发芽势的影响。【结果】1）随着垃圾渗滤液体积分数的增大，香菜叶片中叶绿素含量逐渐减少，当渗滤液体积分数为75%时，香菜叶片叶绿素含量降至最小值9.21 mg/g；香菜叶片叶绿素a/b值总体也呈减小的趋势。2）随着渗滤液体积分数的增大，香菜叶片外渗电导率呈正比例增加，当渗滤液体积分数为75%时，叶片外渗电导率达到最大值512.0 mS/cm。3）当渗滤液体积分数从0%增加到67%时，香菜叶片中蛋白质含量降至最小值8.26 g/kg；之后随着渗滤液体积分数的增加，香菜叶片蛋白质含量呈增大的趋势。4）随着渗滤液体积分数的增加，香菜种子发芽势和发芽率均呈先增加后减小的趋势。【结论】不同体积分数垃圾渗滤液均可导致香菜叶片光合作用减弱；当体积分数高于67%时，渗滤液会毒害香菜种子，使其发芽率和发芽势降低。

Physiological toxic effects of leachate on coriander

【Objective】 The research was made in order to understand toxic effects of leachate on growth of coriander to probe into toxicant mechanisms of leachate on plants,and to provide scientific basis for discharge standards of leachate.【Method】 Some pot experiments and Petri dishes method have been processed,and effects of different volumes of leachate(0%(CK),50%,67%,75%) on chlorophyll contents,exosmose conductivity rate,protein contents,germination rates and germination potential have been studied by taking coriander as a research object.【Result】 The results show that the chlorophyll contents of coriander leaf decrease gradually with the increase of leachate volume fractions.When the volume fraction of leachate is 75%,the chlorophyll contents of coriander reach the minimum,which is 9.21 mg/g.And chlorophyll a/b value shows decreasing trend totally.With the increase of leachate volume fraction,exosmose conductivity rate of coriander leaf increases in a direct ratio.When the leachate volume fraction is 75%,exosmose conductivity rate of coriander leaf reach the maximum 512.0 mS/cm.Leachate volume fractions increase from 0% to 67%,protein contents fall down to the minimum 8.26 g/kg,and then with the increase of leachate volume fraction,protein contents show an increase trend.With the increase of leachate volume fraction,germination potential and germination rates all show an increase trend firstly and then a decrease.【Conclusion】 Photosynthesis of coriander is weakened in different leachate volume fractions.While leachate volume fraction is over 67%,coriander seeds are poisoned,and germination potential and germination rates decrease.